Accessor: Generate Portal Type accessors for transitions date of Workflow History.

Such as:
  - getStartTransitionDateList() and getStartTransitionDate().
  - getDeliverTransitionDateList() and getDeliveryTransitionDate().
  - ...

Where the non-List accessors returned the last element.

Use Case: Set AT.{start,stop}_date from PPL stop transition date.

product/ERP5Type/Accessor/WorkflowHistory.py

+##############################################################################
+#
+# Copyright (c) 2018 Nexedi SARL and Contributors. All Rights Reserved.
+#
+# WARNING: This program as such is intended to be used by professional
+# programmers who take the whole responsability of assessing all potential
+# consequences resulting from its eventual inadequacies and bugs
+# End users who are looking for a ready-to-use solution with commercial
+# garantees and support are strongly adviced to contract a Free Software
+# Service Company
+#
+# This program is Free Software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+##############################################################################
+
+from Products.ERP5Type.PsycoWrapper import psyco
+from Base import Getter as BaseGetter
+from Acquisition import aq_base
+
+class ListGetter(BaseGetter):
+    """
+    Get all 'key' properties from Workflow History Transitions. A
+    default value can be provided if needed.
+    """
+    def __init__(self, id, workflow_id, transition_id, key):
+      self._id = id
+      self.__name__ = id
+      self._workflow_id = workflow_id
+      self._transition_id = transition_id
+      self._key = key
+
+    def __call__(self, instance, *args):
+      try:
+        default = args[0]
+      except IndexError:
+        default = []
+
+      instance = aq_base(instance)
+      try:
+        workflow_history_dict_list = instance.workflow_history[self._workflow_id]
+      except (AttributeError, KeyError):
+        return default
+      else:
+        result_list = []
+        for workflow_history_dict in workflow_history_dict_list:
+          if workflow_history_dict['action'] == self._transition_id:
+            result_list.append(workflow_history_dict.get(self._key, default))
+
+        return result_list if result_list else default
+
+    psyco.bind(__call__)
+
+class Getter(BaseGetter):
+    """
+    Get 'key' property from Workflow History latest Transition. A
+    default value can be provided if needed.
+    """
+    def __init__(self, id, list_accessor_name):
+      self._id = id
+      self.__name__ = id
+      self._list_accessor_name = list_accessor_name
+
+    def __call__(self, instance, default=None):
+      value_list = getattr(instance, self._list_accessor_name)()
+      try:
+        return value_list[-1]
+      except IndexError:
+        return default
+
+    psyco.bind(__call__)

product/ERP5Type/Base.py

@@ -481,6 +481,7 @@ def getClassPropertyList(klass):
         if p not in ps_list])
   return ps_list
 
+from Products.ERP5Type.Accessor import WorkflowHistory as WorkflowHistoryAccessor
 def initializePortalTypeDynamicWorkflowMethods(ptype_klass, portal_workflow):
   """We should now make sure workflow methods are defined
   and also make sure simulation state is defined."""
@@ -518,6 +519,21 @@ def initializePortalTypeDynamicWorkflowMethods(ptype_klass, portal_workflow):
 
       storage = dc_workflow_dict
       transitions = wf.transitions
+
+      for transition in transitions.objectValues():
+        transition_id = transition.getId()
+        list_method_id = 'get%sTransitionDateList' % UpperCase(transition_id)
+        if not hasattr(ptype_klass, list_method_id):
+          method = WorkflowHistoryAccessor.ListGetter(list_method_id, wf_id, transition_id, 'time')
+          ptype_klass.registerAccessor(method,
+                                       Permissions.AccessContentsInformation)
+
+        method_id = 'get%sTransitionDate' % UpperCase(transition_id)
+        if not hasattr(ptype_klass, method_id):
+          method = WorkflowHistoryAccessor.Getter(method_id, list_method_id)
+          ptype_klass.registerAccessor(method,
+                                       Permissions.AccessContentsInformation)
+
     elif wf_type == "InteractionWorkflowDefinition":
       storage = interaction_workflow_dict
       transitions = wf.interactions

product/ERP5Type/tests/testDynamicClassGeneration.py

@@ -323,6 +323,57 @@ class TestPortalTypeClass(ERP5TypeTestCase):
     self.assertTrue(not erp5.portal_type.Person.__isghost__)
     self.assertTrue('_categories' in erp5.portal_type.Person.__dict__)
 
+  def testWorkflowHistoryAccessor(self):
+    person = self.portal.person_module.newContent(portal_type='Person')
+
+    from Products.ERP5Type.Utils import UpperCase
+    for transition_id in ('delete',
+                          'delete_action',
+                          'invalidate',
+                          'invalidate_action',
+                          'validate',
+                          'validate_action'):
+      method_id = 'get%sTransitionDate' % UpperCase(transition_id)
+      self.assertNotEqual(getattr(person, method_id, None), None)
+      self.assertEqual(getattr(person, method_id)('hoge'), 'hoge')
+
+      list_method_id = 'get%sTransitionDateList' % UpperCase(transition_id)
+      self.assertNotEqual(getattr(person, list_method_id, None), None)
+      self.assertEqual(getattr(person, list_method_id)('hoge'), 'hoge')
+
+    person.validate()
+    self.assertEqual(len(person.getInvalidateTransitionDateList()), 0)
+    validate_date_list = person.getValidateTransitionDateList()
+    self.assertEqual(len(validate_date_list), 1)
+    self.assertEqual(
+      sorted([ workflow_history_dict['time']
+               for workflow_history_dict in person.workflow_history['validation_workflow']
+               if workflow_history_dict['action'] == 'validate' ]),
+      validate_date_list)
+    self.assertEqual(person.getValidateTransitionDate(), validate_date_list[0])
+
+    person.invalidate()
+    invalidate_date_list = person.getInvalidateTransitionDateList()
+    self.assertEqual(len(invalidate_date_list), 1)
+    self.assertEqual(
+      sorted([ workflow_history_dict['time']
+               for workflow_history_dict in person.workflow_history['validation_workflow']
+               if workflow_history_dict['action'] == 'invalidate' ]),
+      invalidate_date_list)
+    self.assertEqual(person.getInvalidateTransitionDate(), invalidate_date_list[0])
+    self.assertEqual(person.getValidateTransitionDateList(), validate_date_list)
+
+    person.validate()
+    self.assertEqual(person.getInvalidateTransitionDateList(), invalidate_date_list)
+    validate_date_list = person.getValidateTransitionDateList()
+    self.assertEqual(len(validate_date_list), 2)
+    self.assertEqual(
+      sorted([ workflow_history_dict['time']
+               for workflow_history_dict in person.workflow_history['validation_workflow']
+               if workflow_history_dict['action'] == 'validate' ]),
+      validate_date_list)
+    self.assertEqual(person.getValidateTransitionDate(), validate_date_list[-1])
+
 class TestZodbPropertySheet(ERP5TypeTestCase):
   """
   XXX: WORK IN PROGRESS